package com.ruoyi.framework.interceptor.impl;
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import cn.hutool.core.convert.Convert;
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import cn.hutool.core.io.IoUtil;
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import com.ruoyi.common.annotation.RepeatSubmit;
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import com.ruoyi.common.constant.Constants;
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import com.ruoyi.common.filter.RepeatedlyRequestWrapper;
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import com.ruoyi.common.utils.JsonUtils;
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import com.ruoyi.common.utils.RedisUtils;
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import com.ruoyi.common.utils.StringUtils;
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import com.ruoyi.framework.config.properties.RepeatSubmitProperties;
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import com.ruoyi.common.properties.TokenProperties;
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import com.ruoyi.framework.interceptor.RepeatSubmitInterceptor;
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import lombok.RequiredArgsConstructor;
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import lombok.extern.slf4j.Slf4j;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Component;
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import javax.servlet.http.HttpServletRequest;
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import java.io.IOException;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.concurrent.TimeUnit;
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/**
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* 判断请求url和数据是否和上一次相同，
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* 如果和上次相同，则是重复提交表单。
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*
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* @author Lion Li
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*/
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@Slf4j
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@RequiredArgsConstructor(onConstructor_ = @Autowired)
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@Component
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public class SameUrlDataInterceptor extends RepeatSubmitInterceptor {
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public final String REPEAT_PARAMS = "repeatParams";
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public final String REPEAT_TIME = "repeatTime";
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private final TokenProperties tokenProperties;
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private final RepeatSubmitProperties repeatSubmitProperties;
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@SuppressWarnings("unchecked")
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@Override
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public boolean isRepeatSubmit(RepeatSubmit repeatSubmit, HttpServletRequest request) {
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// 如果注解不为0 则使用注解数值
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long intervalTime = repeatSubmitProperties.getIntervalTime();
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if (repeatSubmit.intervalTime() > 0) {
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intervalTime = repeatSubmit.timeUnit().toMillis(repeatSubmit.intervalTime());
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}
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String nowParams = "";
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if (request instanceof RepeatedlyRequestWrapper) {
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RepeatedlyRequestWrapper repeatedlyRequest = (RepeatedlyRequestWrapper) request;
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try {
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nowParams = IoUtil.readUtf8(repeatedlyRequest.getInputStream());
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} catch (IOException e) {
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log.warn("读取流出现问题！");
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}
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}
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// body参数为空，获取Parameter的数据
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if (StringUtils.isEmpty(nowParams)) {
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nowParams = JsonUtils.toJsonString(request.getParameterMap());
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}
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Map<String, Object> nowDataMap = new HashMap<String, Object>();
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nowDataMap.put(REPEAT_PARAMS, nowParams);
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nowDataMap.put(REPEAT_TIME, System.currentTimeMillis());
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// 请求地址（作为存放cache的key值）
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String url = request.getRequestURI();
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// 唯一值（没有消息头则使用请求地址）
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String submitKey = request.getHeader(tokenProperties.getHeader());
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if (StringUtils.isEmpty(submitKey)) {
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submitKey = url;
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}
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// 唯一标识（指定key + 消息头）
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String cacheRepeatKey = Constants.REPEAT_SUBMIT_KEY + submitKey;
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Object sessionObj = RedisUtils.getCacheObject(cacheRepeatKey);
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if (sessionObj != null) {
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Map<String, Object> sessionMap = (Map<String, Object>) sessionObj;
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if (sessionMap.containsKey(url)) {
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Map<String, Object> preDataMap = (Map<String, Object>) sessionMap.get(url);
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if (compareParams(nowDataMap, preDataMap) && compareTime(nowDataMap, preDataMap, intervalTime)) {
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return true;
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}
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}
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}
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Map<String, Object> cacheMap = new HashMap<String, Object>();
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cacheMap.put(url, nowDataMap);
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RedisUtils.setCacheObject(cacheRepeatKey, cacheMap, Convert.toInt(intervalTime), TimeUnit.MILLISECONDS);
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return false;
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}
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/**
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* 判断参数是否相同
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*/
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private boolean compareParams(Map<String, Object> nowMap, Map<String, Object> preMap) {
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String nowParams = (String) nowMap.get(REPEAT_PARAMS);
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String preParams = (String) preMap.get(REPEAT_PARAMS);
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return nowParams.equals(preParams);
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}
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/**
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* 判断两次间隔时间
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*/
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private boolean compareTime(Map<String, Object> nowMap, Map<String, Object> preMap, long intervalTime) {
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long time1 = (Long) nowMap.get(REPEAT_TIME);
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long time2 = (Long) preMap.get(REPEAT_TIME);
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return (time1 - time2) < intervalTime;
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}
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}
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